Hi,
1880 Washington, Bradley, AR
J. Downard Singer, b. AR, 28, farmer
Sora I, b. AL, 28
I did find a family group sheets with John's parents and siblings at
www.rootsweb.ancestry.com/~arbradle/groupsheets/. It says that he died in 1884.
I think John and Izora both died before the 1900 Census. I looked for them in the Arkansas 1819-1920 death list but didn't find them. Not many people are in it. Death certificates weren't required until 1914.
You can do a Google search for Bradley County Arkansas Cemeteries and look for them in the inventoried cemeteries.
There is a volunteer in Bradley County who will do lookups in the courthouse and cemetery books. You'll find the volunteer's contact info at
www.gengathering.com. You must create a user ID and password to enter this web site. However access to the volunteer contact info is free.
Also there is the Bradley County Genealogical Society,
www.rootsweb.ancestry.com/~arbradle/bradcogensoc.shtml. I don't know if they do research or not. Successful Searching!